Paper-damping machine



PATENT EEicE.

WALTER SCOTT, OF CHICAGO, ILLINOIS.

PAPER-DAMPING MACHINE. 4

SPECIFICATION forming part of Letters Patent No. 225,491, dated March16, 1880. Application iiled August '7, 1879.

To all whom it may concern:

Be it known that I, WALTER SCOTT, of Chicago, in the county of Cook andState of Illinois, have invented a new and useful Improve ment inPaper-Damping Machines, which is fully described in the followingspecification, reference beinghad to the accompanying drawings, inwhich- Figure l represents an end elevation of a machine' embodying myimprovements; Fig. 2, a rear elevation of the same 5 Fig. 3, a plan viewof the changeable speed mechanism; Fig. 4, a detail elevation of thedriving-gear at the back end of the machine 5 and Fig. 5, a detailsection taken through the wheel Gr on its shaft, as represented in Fig.3.

My invention relates to machines for damping paper as it is drawn over.a rest or table from the roll on one side thereof, and rerolled,

after damping, on the other side; and the object of the invention is toprovide for automatically andregularly changing the speed at which theroller is driven on which the webof paper is rerolled to correspondwiththe gradual increase in size of said roll.

It consists of a pair of conical rollers in a paper-damping machine, oneof which receives motion from any suitable power, and the other of whichis connected positively to the rerolling-shaft, in combination with adevice for transmitting motion from the driving-roller to the otherconical roller, said device being adapted to move automatically from thelarger to the smaller end of the driving-roller as the roll of paperonthe rewinding-shaft increases in size.

It also consists in special devices and comcombinations of devices, allof which will be hereinafter more fully described, and pointed outdefinitely in the claims.

The main parts of the damping-machine are well known, and will requireno more than a simple reference to them here. A

In the drawings, A represents the supporting-frame, and B the shaftonwhich the spool is placed, containing the dry paper, and B a secondshaft at the other end of the machine', which receives the spool onwhich the paper is to be rewound, the" usual wetting-table C beingarranged between these two shafts, and somewhat above them,overwhichisthe sprayer c, which throws al ne spray of water above the paper asdrawn over the table.

The rerolling-shaft B is mounted in stationary bearings on thesupporting-frame, and at the rear end of the machine is provided with afast gear-wheel, b, which is driven by a band-wheel, D, through apinion, d, connected to the bandwheel, and a transmitting-gear, d',engaging withv both the pinion and the wheel b. The wheel D is driven bya band, D, from a similar wheel, c, on the outer end of a shaft, e,which also carries a long conical roller, E, the shaft being mounted inthe upper portion of the uprightv part of the supportingframe.

In front of the conical roller E is a similar y ,motion is communicatedto it in any suitable way.

Instead of the bands usually employed with these conical rollers I usea-friction-wheel, G, to transmit motion from one conical drivingrollerto the other. This friction-wheel is annular inconstruction, and ismounted lon a hub, g, arranged on a stationary rod, H, on which it isfree to slide back and forth, but is held from rotating by a spline, h,on the rod, fitting in a groove, g', in the hub. The rod H is, ofcourse, arranged parallel with the inner faces of the two conicalrollers and. diagonally to their axes, so that the plane of rotation ofthe friction-wheel is inclined to the axis of the conical rollers. Therod H is also arranged a little above the plane of the shafts of theconical rollers, so that the axis of the frictionwheel will be above theaxes of the conical rollers. With this arrangement of these devices therotation of the driving-roller F is not only transmitted to the rollerE, but at the same the friction-wheel will be moved back and forthautomatically on its supportingshaft, the direction depending upon thedirection in which the drive-roller is rotated.

The mechanism being thus arranged so that the rotation of thedriving-roller F in one direction will cause the wheel G to movelongitudinally on its rod from one end of said rod IOO to the other,while the opposite revolution of said driving-roller will move the wheelin the opposite direction on its rod, it is sufficient so to arrange theconnections between said conical rollers and the rewinding-roll thatlongitudinal motion of the intermediate wheel, G, shall be caused fromthe larger to the smaller end of the driving-roller IP while the roll isrewinding, in order to effect a retardation of said rewinding-roll as itincreases in size. It is plain that the direction of the rotation of thedriving-roll to cause the motion of the intermediate roller in theproper direction lon gitudinally to retard the speed of therewindingroll at the proper time will depend upon Whether the locationof the rod on which the intermediate roller slides is above or below theplane of the conical rollers. Manifestly, also, the amount of taperofthe conical rollers must be adapted to the amount of increase of therewinding-roll, in order to cause the paper to pass at a uniform rate ofspeed from one roll to the other under the sprinkler.

The boxes c2 f', in which the shafts of the conical rollers have theirbearings, are adjustable horizontally, and the ends of the rod H areadjustable vertically, so-that the proper relation of the conicalrollers and frictionwheel may always be maintained. The adjustments maybe effected by any suitable means.

In the drawings the parts-mentioned are shown supported in slots, inwhich they are adjusted and held by means of set-screws.

As stated above, the reciprocation ofthe friction-wheel is effectedautomatically by the action of the conical rollers thereon when rotated.The friction-wheel is returned to its starting position, as shown inFig. 3 of the drawings, by reversing the movement of the roller F, whichhas the effect to drive the friction-wheel in the opposite direction tothat above mentioned.

In order to insure the constant sliding movement of the friction-wheel Ialso provide mechanism by which the said wheel is moved positively onits shaft as the new roll gradually fills. This is accomplished by meansof a segmental rack, I, which is fastened to one end ofthe rock-shaftt', on which the friction-roller J is mounted. This latter roller isarranged to drop against the new roll of paper and run in contacttherewith underneath the web, as shown in Fig. l ofthe drawings. As theroll fills it is evident that this friction-roller will be graduallyraised, thereby oscillating the rock-shaft by the arms j, on which theroller is mounted, and which are fastened to the rockshaft, and thismovement will, of course, give a corresponding vibration to the rack I.

A gear-Wheel, K,is mounted on a short shaft just over the rack, whichengages with a pinion, k, on the same shaft and connected to the wheelK.4 The gear-wheel K engages with a pinion, L, connected with a band-pulley, M, both being mounted on the same short shaft at one side ofthe wheel K.

A band or cord, N, is wound around the pulley M, and one end thereofcarried up over the pulley m and fastened to one side of the hub of thefriction-wheel G. The other end is carried up and across the machineover the pulleys a and secured to the other side of the hub. Thevibration of the segmental rack, effected by the gradual increase in thesize of the paper roll, Will evidently impart a slow rotation to theband-pulley M, and the gearing is arranged to drive the said pulley bythis movement in the proper direction to Wind .up on that part of thecord which will tend to draw thc friction-wheel G toward the smaller endof the conical roller F, and, of course, producing a pull in theopposite direction when the pulley M is reversed. The sliding movementof the friction-wheel G, above mentioned, will therefore be eEectedpositively through mechanism which is operated by the` gradual increasein the size of .the paper roll, thereby insuring absolute certainty inthe movement of Athe friction-wheel to effect the desired retardation inthe revolution of the paper roll as it fills. The same effect upon thefrictionwheel will be produced by locating the axis of the said wheelbelo7 the plane of the axes of the conical rollers, or at one sidethereof if the said axes are not located in a horizontal plane 5 andtherefore I do not limit myself to the precise arrangement of thesedevices shown and described.

A lever, O, may be fastened to the rockshaft t', by means of which therack I may be vibrated to reverse the speed changer and bring it back tothe proper position for starting again.

A brake, P, is pivoted to the supportingframe and arranged so that itsfree end Will rest upon the rim of the segment which carries the rack,this rim being smooth underneath the brake. A set-screw, 19,'above thebrake regulates the pressure of the latter upon the segment and therebymakes a frictional tension for 'the roller J, which regulates thepressure which the latter bears upon the roll of dampened paper. Thismechanism forl reciprocating the speed-changer by the gradual increasein the size of the roll is applicable to other devices besides thefriction-Wheel here shown and described. The ordinary band running overthe two conical rollers may be employed, and with a sliding band-shifterproperly mounted and connected, by the cord N or other suitable device,with the gearing herein shown, it may be shifted from one end of therollers to the other by the oscillation of the rock-shaft, as abovedescribed.

The pressure-roller J with its arms evidently operates as a lever tooscillate the rock-shaft and segmental rack, the lever being actuated bythe roll of paper as it increases in size. Now'this lever may be of someother construction, it being necessary only that it shall be soconstructed and arranged that its free end will be moved by the roll ofpaper as it increases in size, and that it is connected to the rack sothat the latter will be vibrated With- IOO IOS

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the vibration of the lever. Then, whatever contrivancc may be employedfor transmitting motion from one conical roller to the other, (providedalways that it is movable,) it may be shifted automatically by thegradual increase in the size of the new roll of paper by connecting itproperly with thegearing herein shown, or other equivalent devices, soas to keep the movementof the web of paper under the sprinkler alwaysuniform, thereby insuring a uniform wetting of the paper.

I do not broadly claim a pair of conical rollers having anautomatically-sliding connection between them for varying the speed,such a combination of devices being old.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is i 1. The rerolling-shaft B', in combinationwith the gear-wheels b d d', the band D', the band-wheels D e, conicalrollers E F, and reciprocating friction-wheel Gr, substantially asdescribed. Y

2. A segmental gear-rack, I, connected with a lever which is vibrated bythe paper roll as it ills,in combination with the pulley M, driven bythe rack, cord N, friction-Wheel G, and conical rollers F E, constructedand operating substantially as described.

3. The friction-roller J, arranged to run in contact with the roll ofpaper as it is rerolled on the shaft B', in combination with therockshaft z', segmental rack I, gear-wheels K, k,

and L, the pulley M, cord N, pulleys m and n, reciprocatingfriction-wheel Gr, and conical rollers F E, substantially as described.

4. The friction-roller J, running in contact with the paper roll onshaft B', in combination with the rock-shaft i, segmental rack I, andadjustable brake P, substantially as described. i

5. In a paper damping machine, the rerolling shaft B', in combinationwith the conical rollers F E, a mechanism for driving said shaft fromthe rollers, a sliding friction-wheel, G, for transmitting motion fromone roller to the other, and mechanism for moving said wheel laterally,operated by the roll of damp paper as it increases in size in rerolling,whereby the speed is gradually and constantly slackened by thegradualllng of the paper roll, substantially as described.

6. The conical rollers E and F, in combina tion with a friction-wheel,Gr, running in contact with each and adapted to slide upon a rodarranged outside the plane of the axis of said rollers, whereby'longitudinal motion of the wheel upon said rod is produced, said conicalrollers and friction-wheel being adapted to operate in connection withthe rewinding-roll of a paperdamping machine, as and for the purpose setforth.

WALTER SCOTT. Witnesses:

JNO. G. MAGGREGOR, l W. O. OoRLIEs.

